OAKLAND -- A crash involving a scooter, a big rig and a pickup truck has severely backed up traffic on westbound Interstate 80, from the Bay Bridge incline as far as Richmond.

The crash was reported about 6 a.m. and blocked the left lane about a mile east of Treasure Island. The lane was cleared about 6:45 a.m., but the backup now stretches all the way up the Eastshore Freeway past the 580 split, according to Sigalert.com

At least one person has complained of pain, according to a CHP dispatcher. An ambulance is on the way to the scene.